diff options
Diffstat (limited to 'crypto/kerberosIV/lib/krb/verify_user.c')
| -rw-r--r-- | crypto/kerberosIV/lib/krb/verify_user.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/crypto/kerberosIV/lib/krb/verify_user.c b/crypto/kerberosIV/lib/krb/verify_user.c new file mode 100644 index 0000000..36c64d7 --- /dev/null +++ b/crypto/kerberosIV/lib/krb/verify_user.c @@ -0,0 +1,185 @@ +/* + * Copyright (c) 1995, 1996, 1997, 1998, 1999 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "krb_locl.h" + +RCSID("$Id: verify_user.c,v 1.17.2.1 1999/12/06 22:57:17 assar Exp $"); + +/* + * Verify user (name.instance@realm) with `password'. + * + * If secure, also verify against local + * service key (`linstance'.hostname) (or rcmd if linstance == NULL), + * this can (usually) only be done by root. + * + * If secure == KRB_VERIFY_SECURE, fail if there's no key. + * If secure == KRB_VERIFY_SECURE_FAIL, don't fail if there's no such + * key in the srvtab. + * + * As a side effect, fresh tickets are obtained. + * + * srvtab is where the key is found. + * + * Returns zero if ok, a positive kerberos error or -1 for system + * errors. + */ + +static int +krb_verify_user_srvtab_exact(char *name, + char *instance, + char *realm, + char *password, + int secure, + char *linstance, + char *srvtab) +{ + int ret; + + ret = krb_get_pw_in_tkt(name, instance, realm, + KRB_TICKET_GRANTING_TICKET, + realm, + DEFAULT_TKT_LIFE, password); + if(ret != KSUCCESS) + return ret; + + if(secure == KRB_VERIFY_SECURE || secure == KRB_VERIFY_SECURE_FAIL){ + struct hostent *hp; + int32_t addr; + + KTEXT_ST ticket; + AUTH_DAT auth; + + char lrealm[REALM_SZ]; + char hostname[MaxHostNameLen]; + char *phost; + + if (gethostname(hostname, sizeof(hostname)) == -1) { + dest_tkt(); + return -1; + } + + hp = gethostbyname(hostname); + if(hp == NULL){ + dest_tkt(); + return -1; + } + memcpy(&addr, hp->h_addr, sizeof(addr)); + + ret = krb_get_lrealm(lrealm, 1); + if(ret != KSUCCESS){ + dest_tkt(); + return ret; + } + phost = krb_get_phost(hostname); + + if (linstance == NULL) + linstance = "rcmd"; + + if(secure == KRB_VERIFY_SECURE_FAIL) { + des_cblock key; + ret = read_service_key(linstance, phost, lrealm, 0, srvtab, &key); + memset(key, 0, sizeof(key)); + if(ret == KFAILURE) + return 0; + } + + ret = krb_mk_req(&ticket, linstance, phost, lrealm, 33); + if(ret != KSUCCESS){ + dest_tkt(); + return ret; + } + + ret = krb_rd_req(&ticket, linstance, phost, addr, &auth, srvtab); + if(ret != KSUCCESS){ + dest_tkt(); + return ret; + } + } + return 0; +} + +/* + * Try to verify the user and password against all the local realms. + */ + +int +krb_verify_user_srvtab(char *name, + char *instance, + char *realm, + char *password, + int secure, + char *linstance, + char *srvtab) +{ + int ret; + int n; + char rlm[256]; + + /* First try to verify against the supplied realm. */ + ret = krb_verify_user_srvtab_exact(name, instance, realm, password, + secure, linstance, srvtab); + if (ret == KSUCCESS) + return KSUCCESS; + + /* Verify all local realms, except the supplied realm. */ + for (n = 1; krb_get_lrealm(rlm, n) == KSUCCESS; n++) + if (strcmp(rlm, realm) != 0) { + ret = krb_verify_user_srvtab_exact(name, instance, rlm, password, + secure, linstance, srvtab); + if (ret == KSUCCESS) + return KSUCCESS; + } + + return ret; +} + +/* + * Compat function without srvtab. + */ + +int +krb_verify_user(char *name, + char *instance, + char *realm, + char *password, + int secure, + char *linstance) +{ + return krb_verify_user_srvtab (name, + instance, + realm, + password, + secure, + linstance, + (char *)KEYFILE); +} |
